Hi
I feel really stupid.You practicaly solved that for me and I still do not know how to solve almost any of it.I do not know in what point to use what test and how to find the end points.I am trying over and over and i just cannot do any progress.I have about 10 more similar problems that I have to solve, but I am not even able to solve these here.Please can someone show me step by step solution,so I will be able to understand.

Thank You very much for your help.
I calculated the endpoints and I would really appreciate if you just check them if I am not wrong.
1.set (-1,1) so no endpoints
2.the same as #1
3.all x
4.allx
5.[-1/e,1/e], so both endpoints belong to convergence set.

Thank You very much for your help.
I calculated the endpoints and I would really appreciate if you just check them if I am not wrong.
1.set (-1,1) so no endpoints
2.the same as #1
3.all x
4.allx
5. , so both endpoints belong to convergence set.